Vulnerability identifier: #VU69240

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-45063

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
xterm
Other software / Other software solutions

Vendor: invisible-island.net

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation when processing font ops. A remote attacker can trick the victim into opening a specially crafted file and execute arbitrary OS commands on the target system within the vi line-editing mode of Zsh.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

xterm: 300 - 374c

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External links
http://invisible-island.net/xterm/xterm.log.html
http://www.openwall.com/lists/oss-security/2022/11/10/1
http://news.ycombinator.com/item?id=33546415
http://www.openwall.com/lists/oss-security/2022/11/10/1
http://www.openwall.com/lists/oss-security/2022/11/10/5

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.